The change of tension is then determined by comparing this measured tension in the string to the tension in the string previously measured under no-load conditions.

The first voltage measured at the pin is greater than a second voltage measured at the output.

A control system is connected to the detector that compares a first measured voltage and a second measured voltage and determines whether the second voltage exceeds a threshold value.

The system then compares the measured voltage with a target voltage for each bank, and adjusts the charging process based on results of the comparisons between the measured voltage and the target voltage.

It is determined whether the measured voltage is between the minimum voltage and the reference voltage.

Measured Voltage (V) Measured Temperature (K) Measured Current

A first resistance of the RTD (32) is calculated based on the measured voltage across the reference resistor (34) and the measured first voltage.

A tension measuring portion (46) measures the tension of the film and inputs the measured tension into a tension controller (59).

Power is adjusted and supplied when the measured voltage is not between the minimum voltage and the reference voltage.

The differential equation comprises the battery state and the measured voltage.

A second voltage across the reference resistor (34) is then estimated based on the measured second voltage across the RTD (32) and the measured first voltage across the reference resistor (34).

A torque calculator (61) compares the measured tension with reference tension read from a memory (60) to calculate torque of the suction drum, which is necessary for equalizing the measured tension to the reference tension.

The method may modify the measured voltage by multiplying/dividing the voltage by a reduction factor.

A comparison (74) is then made between the measured voltage (ΔV) and an alarm voltage value (ΔV).

The value of the measured offset compensation voltage is stored.